Utah Child Support Calculator

Utah calculates child support under the Utah Child Support Act, codified at Utah Code Ann. § 78B-12-101 et seq., using the Income Shares model. The foundational principle is that a child should receive the same proportion of both parents' combined income that would have been spent on the child if the family had remained intact. Both parents are treated as financially responsible for their child, and each parent's obligation is calculated in proportion to their share of the combined monthly adjusted gross income. The Act is mandatory for all child support proceedings in Utah, and courts are required to follow the guidelines unless they find that applying them would be unjust or inappropriate in a particular case.

The Utah guidelines are structured around a series of worksheets that correspond to different custody arrangements. Worksheet 1 applies when one parent has sole physical custody, Worksheet 2 applies in joint physical custody situations where both parents have the child at least 30% of the overnights, and Worksheet 3 is used for split custody when there are multiple children and each parent has primary custody of at least one. Selecting the correct worksheet at the outset is critical because the formulas for each are substantially different and produce significantly different support amounts.

Utah's guidelines are updated periodically to reflect economic research on child-rearing costs. The base support tables in the guidelines are derived from the most current Consumer Expenditure Survey data available to the state, adjusted for Utah-specific economic conditions. The state's Office of Recovery Services publishes the official guidelines tables and worksheets, and licensed attorneys, courts, and parents may all use the published tables to estimate a support obligation before any formal proceeding. Estimates produced by unofficial calculators should always be verified against the current official tables.

Utah defines gross income broadly to include all income from any source before deductions. Wages, salaries, self-employment income, commissions, bonuses, rental income, dividends, interest, pension distributions, Social Security benefits except SSI, unemployment compensation, and workers' compensation are all included. When a parent is voluntarily unemployed or underemployed without good cause, Utah courts may impute income based on the parent's recent work history, education level, and prevailing wage rates in the local job market. Imputation prevents a parent from manipulating their reported income to reduce their child support obligation artificially.

Adjusted gross income under Utah law is calculated by starting with gross income and subtracting a narrow list of allowable deductions. The primary permitted deduction is for pre-existing child support obligations that the parent is actually paying pursuant to a court order for children born to a different relationship. Utah does not permit deductions for voluntary expenses or discretionary spending, and courts scrutinize claimed deductions carefully. For self-employed parents, ordinary and necessary business expenses reduce gross income to arrive at net self-employment income, but personal expenses run through a business account are disallowed.

Once each parent's adjusted gross income is established, the two figures are added together to produce the combined monthly adjusted gross income. This combined income is then entered into the base support table from the Utah Child Support Guidelines to identify the basic child support obligation for the applicable number of children. The basic obligation represents the total monthly amount that both parents together are presumed to spend on the child. Each parent's share of the basic obligation is calculated by dividing their individual adjusted gross income by the combined total and multiplying by the basic obligation amount.

Utah's base child support table converts the combined adjusted gross income and number of children into a monthly dollar amount that represents average child-rearing costs at that income level. The table covers combined incomes from very low amounts up to approximately $10,000 or more per month, with increasing obligations at higher income levels. For combined incomes above the table's maximum, Utah courts have discretion to set an amount based on the child's demonstrated needs and the parents' financial resources, rather than mechanically applying the table's highest listed value to even higher incomes.

In addition to the base obligation, Utah requires parents to share the cost of the child's health insurance premiums and work-related childcare expenses. These costs are added to the basic child support obligation before the final pro-rata split. Health insurance premiums are the actual cost attributable to the child's coverage, which is typically calculated as the difference between the parent's individual premium and their family premium. Work-related childcare costs are the actual, reasonable monthly expenses paid by either parent to enable them to work, seek work, or attend school, net of any applicable federal childcare tax credit.

Extraordinary medical expenses — defined in Utah as uninsured and unreimbursed medical costs exceeding $250 per child per year — are treated as an additional support expense. These costs are divided between the parents in proportion to their income shares. Utah courts may address anticipated extraordinary expenses in the original order when a child has a known chronic condition, or parents may address actual expenses as they arise through a motion for reimbursement. Maintaining detailed records of all medical expenditures is important because reimbursement disputes are one of the most common post-decree conflicts in Utah family courts.

When parents share physical custody such that the non-primary parent has the child for at least 111 overnights per year — approximately 30% of the year — Utah applies the joint physical custody worksheet rather than the sole custody worksheet. The joint physical custody calculation uses both parents' incomes and the actual number of overnights each parent has to produce a more equitable result. The rationale is that a parent who has the child for a substantial portion of the year is already incurring significant direct costs for food, clothing, housing, and activities, and the standard sole-custody formula would overstate what needs to be transferred to the other parent.

Under the joint physical custody worksheet, each parent's obligation is initially calculated as if they were the sole paying parent, and then an adjustment is made based on the actual percentage of overnights each parent has. The parent who has fewer overnights generally pays the net difference to the other parent. Utah's formula for this adjustment considers both parents' incomes and time shares simultaneously, so the result is sensitive to the income ratio between the parents as well as the custody split. Small changes in either income or overnights can produce meaningful changes in the net transfer payment.

Split custody situations, where multiple children are involved and each parent has primary physical custody of at least one child, are handled using Worksheet 3. Each parent is treated as both a payer and a recipient simultaneously, with separate calculations determining what each parent would owe for the children living primarily with the other parent. The two obligations are offset, and the parent who owes more pays the net difference. This approach prevents inequitable results that could arise if the guidelines were applied in only one direction when both parents are serving as primary caregivers for some of the children.

Utah requires every child support order to address medical support. Courts must determine which parent will provide health insurance coverage for the child and specify who is responsible for uninsured medical costs. When employer-sponsored coverage is available at a reasonable cost, courts typically order the parent with access to that coverage to maintain it. A cost is considered reasonable if it does not exceed 5% of that parent's gross income. If neither parent has access to affordable group coverage, Medicaid or CHIP enrollment for the child may be ordered, with the cost allocated proportionally.

Medical support in Utah also encompasses dental and vision coverage when it is available at reasonable cost. Courts increasingly include these in standard orders as access to dental and vision insurance has become more common through employer-sponsored plans. Parents who decline available employer-sponsored coverage for the child when it would be affordable are typically required to explain that decision to the court, and courts may impose an equivalent cash contribution in lieu of insurance coverage to ensure the child has access to needed healthcare throughout the year.

Child support orders in Utah may be modified when there is a substantial change in circumstances. A change is presumed substantial if the application of the guidelines to the current circumstances would result in a change of at least 15% or $75 in the monthly support amount, whichever is less. Either parent may file a petition to modify at any time when they believe circumstances have changed sufficiently. Common grounds for modification include a significant change in either parent's income, a change in the custody arrangement, the emancipation of one of the children covered by the order, or a material change in the child's medical or childcare costs.